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11891RE: [midatlanticretro] IMSAI for sale

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  • Bill Sudbrink
    Mar 2, 2009
    • 0 Attachment
      Ouch! That hurts to look at... the insides don't look too bad though.
      I wonder why the CPU on the Cromemco ZPU is up on its own little
      card?

      > -----Original Message-----
      > From: midatlanticretro@yahoogroups.com [mailto:midatlanticretro@yahoogroups.com]On Behalf Of Mike Loewen
      > Sent: Monday, March 02, 2009 8:02 AM
      > To: midatlanticretro@yahoogroups.com
      > Subject: Re: [midatlanticretro] IMSAI for sale
      >
      >
      > On Mon, 2 Mar 2009, B Degnan wrote:
      >
      > > A $200 IMSAI 8080 is a super duper bargain
      >
      > The case is in rough shape:
      >
      > http://sturgeon.css.psu.edu/~mloewen/P1010252.JPG
      > http://sturgeon.css.psu.edu/~mloewen/P1010253.JPG
      >
      > ...but you're right - it's a bargain. I'm going to have to read up on
      > re-forming electrolytic caps. Here's some other info he sent me:
      >
      > "The boards are:
      > - Cromenco Z80 CPU board
      > - Scitronics real-time clock board
      > -- The BIOS I wrote for CP/M makes use of the clock but I'll be darned if
      > I remember how!
      > -- Probably needs a new battery
      > - A serial/parallel board
      > - A serial board that I made (wire-wrapped). It used the 8250 UART which
      > was
      > used by the original IBM PC at that time. A write-up of the board's design
      > can be found in the June 1984 of
      > Microsystems (Sol Libes magazine).
      > - The Morrow Disk Jockey 2D/B.
      > --The BIOS was modified so that an 8" double density floppy could hold
      > about 1200KB instead of the standard 800 or 900 KB. When my friend and I
      > made the change all the nerds that were our friends were amazed and
      > proclaimed that it was all the storage anybody would ever need. Times have
      > changed, right!"
      >
      >
      >
      > Mike Loewen mloewen@...
      > Old Technology http://sturgeon.css.psu.edu/~mloewen/Oldtech/
      >
      >
      > ------------------------------------
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